Add IEEE 802.11 protocol(b/g/n/a/ac) Modes of APs

This patch appends the IEEE 802.11b/g/n/a/ac PHY
protocol modes of scanned Access Points
using internal logic.

Following logic is used to determine WLAN HW protocol:-
1) If “Supported rates” is only till 11 Mbps, and frequency is in
2.4GHz band, then protocol is 802.11B.
2) If “Supported rates” is till 54Mbps or “Extended supported rates”
are present, and frequency is in 2.4GHz band, then protocol is 802.11G.
3) If “Supported rates” is only till 54 Mbps, frequency is in 5GHz
band , then protocol is 802.11A.
4) If “HT capabilities” is supported , then protocol is 802.11N.
5) If “HT capabilities” & “VHT” is supported and frequency is in 5 GHz
band, then protocol is 802.11AC.

Change-Id: I1156ef249cf4a8052a883d31da66788c7d2de22f

2 files changed, 127 insertions, 0 deletions

diff --git a/gsupplicant/gsupplicant.h b/gsupplicant/gsupplicant.h
index 035789e5..597fe751 100644
--- a/gsupplicant/gsupplicant.h
+++ b/gsupplicant/gsupplicant.h
@@ -135,6 +135,16 @@ typedef enum {
 	G_SUPPLICANT_EAP_KEYMGMT_CCKM,
 	G_SUPPLICANT_EAP_KEYMGMT_OKC,
 } GSupplicantEapKeymgmt;
+
+typedef enum {
+	G_SUPPLICANT_MODE_IEEE80211_UNKNOWN,
+	G_SUPPLICANT_MODE_IEEE80211B,
+	G_SUPPLICANT_MODE_IEEE80211BG,
+	G_SUPPLICANT_MODE_IEEE80211BGN,
+	G_SUPPLICANT_MODE_IEEE80211A,
+	G_SUPPLICANT_MODE_IEEE80211AN,
+	G_SUPPLICANT_MODE_IEEE80211ANAC,
+} GSupplicantPhy_mode;
 #endif
 
 typedef enum {
@@ -458,6 +468,7 @@ void *g_supplicant_network_get_wifi_vsie(GSupplicantNetwork *network);
 const unsigned char *g_supplicant_network_get_countrycode(GSupplicantNetwork
 							  *network);
 void *g_supplicant_network_get_bssid_list(GSupplicantNetwork *network);
+GSupplicantPhy_mode g_supplicant_network_get_phy_mode(GSupplicantNetwork *network);
 #endif
 
 struct _GSupplicantCallbacks {
diff --git a/gsupplicant/supplicant.c b/gsupplicant/supplicant.c
index e300f194..e7dfcb27 100644
--- a/gsupplicant/supplicant.c
+++ b/gsupplicant/supplicant.c
@@ -45,6 +45,10 @@
 #define IEEE80211_CAP_PRIVACY	0x0010
 
 #if defined TIZEN_EXT
+#define WLAN_EID_HT_CAP 45
+#define WLAN_EID_VHT_CAP 191
+#define WLAN_EID_SUPP_RATES 1
+#define WLAN_EID_EXT_SUPP_RATES 50
 #define COUNTRY_CODE_LENGTH	2
 #endif
 
@@ -246,6 +250,7 @@ struct g_supplicant_bss {
 	GSList *vsie_list;
 	dbus_bool_t hs20;
 	unsigned char country_code[COUNTRY_CODE_LENGTH];
+	GSupplicantPhy_mode phy_mode;
 #endif
 	unsigned int wps_capabilities;
 #if defined TIZEN_EXT_WIFI_MESH
@@ -277,6 +282,7 @@ struct _GSupplicantNetwork {
 	unsigned int keymgmt;
 	GSList *vsie_list;
 	unsigned char country_code[COUNTRY_CODE_LENGTH];
+	GSupplicantPhy_mode phy_mode;
 #endif
 };
 
@@ -1414,6 +1420,16 @@ dbus_bool_t g_supplicant_network_is_wps_advertizing(GSupplicantNetwork *network)
 	return FALSE;
 }
 
+#ifdef TIZEN_EXT
+GSupplicantPhy_mode g_supplicant_network_get_phy_mode(GSupplicantNetwork *network)
+{
+	if (!network)
+		return G_SUPPLICANT_MODE_IEEE80211_UNKNOWN;
+
+	return network->phy_mode;
+}
+#endif
+
 GSupplicantInterface *g_supplicant_peer_get_interface(GSupplicantPeer *peer)
 {
 	if (!peer)
@@ -2022,6 +2038,7 @@ static int add_or_replace_bss_to_network(struct g_supplicant_bss *bss)
 
 	network->isHS20AP = bss->hs20;
 	memcpy(network->country_code, bss->country_code, COUNTRY_CODE_LENGTH);
+	network->phy_mode = bss->phy_mode;
 #endif
 
 	SUPPLICANT_DBG("New network %s created", network->name);
@@ -2204,6 +2221,50 @@ static unsigned int get_tlv(unsigned char *ie, unsigned int ie_size,
 	return 0;
 }
 
+#if defined TIZEN_EXT
+static void get_bss_phy_mode(unsigned int max_rate,
+		unsigned int max_ext_rate, bool ht, bool vht, void *data)
+{
+	struct g_supplicant_bss *bss = data;
+	unsigned int freq = bss->frequency;
+
+	/* Following conditions are used to determine
+	 * IEEE 802.11 Protocol Modes:-
+	 *
+	 * 1. If “Supported rates” is only till 11 Mbps,
+	 *    and frequency is in 2.4GHz band, then protocol is 11B.
+	 * 2. If “Supported rates” is till 54Mbps or
+	 *    “Extended supported rates” are present,
+	 *    and frequency is in 2.4GHz band, then protocol is 11G.
+	 * 3. If “Supported rates” is only till 54 Mbps,
+	 *    frequency is in 5GHz band , then protocol is 11A.
+	 * 4. If “HT capabilities” is supported , then protocol is 11N.
+	 * 5. If “HT capabilities” & “VHT” is supported and
+	 *    frequency is in 5 GHz band, then protocol is 11AC.
+	 * */
+
+	if (freq >= 2412 && freq <= 2484) { /* 2.4 Ghz Band */
+		if (max_rate <= 11 && max_ext_rate <= 0 && !ht)
+			bss->phy_mode = G_SUPPLICANT_MODE_IEEE80211B;
+		else if ((max_rate <= 54 || max_ext_rate > 0) && !ht)
+			bss->phy_mode = G_SUPPLICANT_MODE_IEEE80211BG;
+		else if ((max_rate >= 54 || max_ext_rate > 0) && ht)
+			bss->phy_mode = G_SUPPLICANT_MODE_IEEE80211BGN;
+		else
+			bss->phy_mode = G_SUPPLICANT_MODE_UNKNOWN;
+	} else if (freq >= 5180 && freq <= 5825) { /* 5 Ghz Band */
+		if (max_rate <= 54 && !ht)
+			bss->phy_mode = G_SUPPLICANT_MODE_IEEE80211A;
+		else if ((max_rate >= 54 || max_ext_rate > 0) && ht && !vht)
+			bss->phy_mode = G_SUPPLICANT_MODE_IEEE80211AN;
+		else if ((max_rate >= 54 || max_ext_rate > 0) && ht && vht)
+			bss->phy_mode = G_SUPPLICANT_MODE_IEEE80211ANAC;
+		else
+			bss->phy_mode = G_SUPPLICANT_MODE_UNKNOWN;
+	}
+}
+#endif
+
 static void bss_process_ies(DBusMessageIter *iter, void *user_data)
 {
 	struct g_supplicant_bss *bss = user_data;
@@ -2212,6 +2273,15 @@ static void bss_process_ies(DBusMessageIter *iter, void *user_data)
 	DBusMessageIter array;
 	unsigned int value;
 	int ie_len;
+#if defined TIZEN_EXT
+	int r_len, j;
+	unsigned char *rates = NULL;
+	unsigned char *ext_rates = NULL;
+	unsigned int max_rate = 0;
+	unsigned int max_ext_rate = 0;
+	bool ht = false;
+	bool vht = false;
+#endif
 
 #define WMM_WPA1_WPS_INFO 221
 #define WPS_INFO_MIN_LEN  6
@@ -2264,6 +2334,44 @@ static void bss_process_ies(DBusMessageIter *iter, void *user_data)
 				continue;
 			}
 		}
+
+		if (ie[0] == WLAN_EID_HT_CAP && ie[1]) {
+			ht = true;
+			continue;
+		}
+
+		if (ie[0] == WLAN_EID_VHT_CAP && ie[1]) {
+			vht = true;
+			continue;
+		}
+
+		if (ie[0] == WLAN_EID_SUPP_RATES && ie[1]) {
+			r_len = ie[1];
+			rates = g_malloc0(r_len);
+			if (!rates)
+				continue;
+
+			for (j = 0; ie && j < r_len; j++) {
+				rates[j] = ((ie[j + 2] & 0x7f) * 500000)/1000000;
+				if (max_rate < rates[j])
+					max_rate = rates[j];
+			}
+			continue;
+		}
+
+		if (ie[0] == WLAN_EID_EXT_SUPP_RATES && ie[1] > 0) {
+			r_len = ie[1];
+			ext_rates = g_malloc0(r_len);
+			if (!ext_rates)
+				continue;
+
+			for (j = 0; ie && j < r_len; j++) {
+				ext_rates[j] = ((ie[j + 2] & 0x7f) * 500000)/1000000;
+				if (max_ext_rate < ext_rates[j])
+					max_ext_rate = ext_rates[j];
+			}
+			continue;
+		}
 #endif
 		if (ie[0] != WMM_WPA1_WPS_INFO || ie[1] < WPS_INFO_MIN_LEN ||
 			memcmp(ie+2, WPS_OUI, sizeof(WPS_OUI)) != 0)
@@ -2299,6 +2407,13 @@ static void bss_process_ies(DBusMessageIter *iter, void *user_data)
 
 		SUPPLICANT_DBG("WPS Methods 0x%x", bss->wps_capabilities);
 	}
+#ifdef TIZEN_EXT
+	get_bss_phy_mode(max_rate, max_ext_rate, ht, vht, user_data);
+	if (rates)
+		g_free(rates);
+	if (ext_rates)
+		g_free(ext_rates);
+#endif
 }
 
 static void bss_compute_security(struct g_supplicant_bss *bss)
@@ -3253,6 +3368,7 @@ static void signal_bss_changed(const char *path, DBusMessageIter *iter)
 	supplicant_dbus_property_foreach(iter, bss_property, bss);
 #if defined TIZEN_EXT
 	network->frequency = bss->frequency;
+	network->phy_mode = bss->phy_mode;
 #endif
 	old_security = network->security;
 	bss_compute_security(bss);